Claims:We Claim:
1. An exhaust gas treatment system (100) comprising:
an exhaust pipe (101) in fluid communication with an engine (101a);
a diesel oxidation catalyst converter (102) having an inlet (102a) and an outlet (102b), said inlet (102a) connected to said exhaust pipe (101);
a selective catalytic reduction device (103) having an inlet (103a) and an outlet (103b), said inlet (103a) connected to said outlet (102b) of said diesel oxidation catalyst converter (102); and
a diesel particulate filter (104) having an inlet (104a) and outlet (104b), said inlet (104a) connected to said outlet (103b) of said selective catalytic reduction device (103);
characterized in that
an oxygen source (201) having an inlet (201a) and an outlet (201b);
a tank (202) located to said outlet (201b) of said oxygen source (201).
a venturi pipe (203) having an inlet (203a) and an outlet (203b), said inlet (203a) of said venturi pipe (203) connected to said tank (202) and said outlet (203b) of said venturi pipe connected in between diesel oxidation catalyst converter (102) and a selective catalytic reduction (103) via a flange .
2. The exhaust gas treatment system (100) as claimed in claim 1, wherein said oxygen source (201) is a rapid pressure swing adsorption system.
3. The exhaust gas treatment system (100) as claimed in claim 1, wherein said tank (202) comprises at least two ends (202a, 202b).
4. The exhaust gas treatment system (100) claimed in claim 3, wherein said tank (202) is located in between said oxygen source (201) and said venturi pipe (203) from each end of said at least two ends (202a, 202b)of said tank (202).
5. The exhaust gas treatment system (100) as claimed in claim 1, wherein a solenoid valve (204) regulates the flow of oxygen in said tank (202).
6. The exhaust gas treatment system (100) as claimed in claim 1, wherein a membrane (205) is disposed in between said venturi pipe (203) and said tank (202).
, Description:Complete Specification:
The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] The invention relates to an exhaust gas treatment system for an engine.

Background of the invention
[0002] The exhaust gas treatment is used to reduce the pollutant emissions. It reduces the nitrogen oxide emissions in combination with an SCR catalytic converter, converting them into water and nitrogen instead.

[0003] The patent application CN107051033A discloses an organic exhaust gas treatment system and method. The organic exhaust gas treatment system comprises a dust remover, an adsorber, a combustor and an oxygen source. The combustion chamber is filled with a non-uniform honeycomb structure. The honeycomb structure comprises an upper layer, a middle layer and an upper layer, the middle layer is a combustion zone. The problems of high device requirement, easily produced secondary pollution, low combustion smoke heat utilization rate and the like of an organic exhaust gas treatment method in the prior art can be solved.

Brief description of the accompanying drawings:
[0004] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawing:
[0005] FIG. 1 illustrates an exhaust gas treatment system according to an embodiment in an invention.

Detailed description of the embodiments
[0006] Figure 1 illustrates a view of an exhaust gas treatment system 100 according to one embodiment of the invention. The exhaust gas treatment system 100 comprises an exhaust pipe 101 in fluid communication with an engine 101a, a diesel oxidation catalyst converter 102, a selective catalytic reduction device 103 and a diesel particulate filter 104. The diesel oxidation catalyst converter 102 comprises an inlet 102a and an outlet 102b wherein the inlet 102a is connected to the exhaust pipe 101. The selective catalytic reduction device (SCR) 103 comprises an inlet 103a and an outlet 103b and the inlet 103a of the SCR device 103 is connected to the outlet 102b of the diesel oxidation catalyst converter 102. The diesel particulate filter 104 comprises an inlet 104a and outlet 104b and the inlet 104a of diesel particulate filter 104 is connected to outlet 103b of the selective catalytic reduction device 103. The exhaust gas treatment system 100 comprises an oxygen source 201 having an inlet 201a and an outlet 201b , a tank 202 connected to the outlet 201b of oxygen source 201 and a venturi pipe 203 having an inlet 203a and an outlet 203b . The inlet 203a of the venturi pipe 203 is connected to the tank 202 and the outlet 203b of the venturi pipe 203 is connected in between the diesel oxidation catalyst converter 102 and selective catalytic reduction device 103 via a flange.

[0007] In the disclosure disclosed above, the exhaust gas flows from the engine 101a to the exhaust gas treatment system 100 via exhaust pipe 101. The exhaust gas then flows from the diesel oxidation catalyst converter 102 to the selective catalytic reduction device 103, then to the diesel particulate filter 104, and then released to the atmosphere. The oxygen is introduced in the exhaust line 105 in between the diesel oxidation catalyst converter 102 and the selective catalytic reduction device 103 by an oxygen source 201.

[0008] According to an embodiment of the disclosure, in an exhaust gas treatment system 100, the oxygen source 201 is a rapid pressure swing adsorption system, which is connected in between diesel oxidation catalyst converter 102 and selective catalytic reduction device 103 by a flange. In rapid pressure swing adsorption system, the air is converted to oxygen and nitrogen is adsorbed by zeolite present in the rapid pressure swing adsorption system. Specific adsorption materials are used as a trap to adsorb the target gas species at high pressure. The pressure then swings to low pressure to desorb the adsorbed material. Here the fresh air is sucked into an suction chamber of the oxygen source 201 and the oxygen is released at the outlet 201b of the oxygen source 201.

[0009] The oxygen source 201 is not restricted to only rapid pressure swing adsorption system, but to any system that is used to produce or generate the oxygen as known to the person skilled in art.

[0010] According to an embodiment of an invention, the tank 202 comprises at least two ends (202a, 202b). The tank 202 is located between the oxygen source 201 and the venturi pipe 203 from each end of the at least two ends (202a, 202b) of the tank 202 respectively. Here the oxygen from oxygen source 201 is stored in the tank 202 and from the tank 202, the oxygen flows to the venturi pipe 203 and then to the exhaust line 105.

[0011] In the disclosure disclosed above, the solenoid valve 204 regulates the flow of oxygen in the tank 202, based on the requirement the oxygen flows from the oxygen source 201 to the tank 202. When the tank 202 is filled with oxygen or when there is no requirement of oxygen in the tank 202, the solenoid valve 204 is closed. Likewise when the tank 202 is empty or when there is a requirement of oxygen, the solenoid valve 204 is opened to regulate the flow of oxygen.

[0012] In the disclosure disclosed above, a membrane 205 is disposed in between the venturi pipe 203 and the tank 202. The membrane 205 prevents the flow of exhaust gases from exhaust line 105 to the tank 202. The membrane 205 promotes the flow of oxygen from low pressure to high pressure and is unidirectional. So that there are no gases from exhaust line 105 flowing back to the tank 202.

[0013] The venturi pipe 203 described in the disclosure above pressurizes the oxygen to enhance the flow from the tank 202 to the exhaust line 105. The venturi pipe 203 converts the velocity of the oxygen to the pressure and the pressurized oxygen flows into the exhaust line 105 located in between the diesel oxidation catalyst converter 102 and selective catalytic reduction device 103.

[0014] In the disclosure disclosed above, the flow of oxygen to the exhaust line 105 eliminates the nitrogen oxides and particulate matter emissions and also minimize the same as per the industry standards. The load on the exhaust gas treatment system 100 is reduced by the use of oxygen in exhaust line 105, which in turn increases the system efficiency. Overall, the carbon monoxide emissions are reduced in the exhaust line 105. The oxygen reacts with exhaust gases and coverts nitrogen oxides to nitrogen di oxide. The hydrocarbon and particulate matter also decreases and soot deposition decreases which overall increases the life of exhaust gas treatment system 100.

[0013] ‘Adapted’ or ‘arranged’, in the context of the instant disclosure, refers to the technical capability or the technical capacity of a component, in relation to which the term ‘adapted’ or ‘arranged’ is used, to carry out or executed a specified action or actions, upon the requirement of the specified action or actions to be carried out or executed. Moreover, the usage of the term ‘adapted’ or ‘arranged’ here, is in reference with the normal technical capability or technical capacity of the component, imparted by the design or the structure or the composition of the component, and not in reference with any special or extraneous capability or capacity, beyond the scope of the normal technical capability or technical capacity. Therefore, there is a need to address this problem

[0014] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.